Q. I have a 2016 Mazda CX-5 with 115,000 miles. It runs like new with coolant, brake, and trans axle fluid changes as well as numerous engine oil changes. What baffles me is that Mazda does not recommend transmission fluid/filter changes. They say it is good for the life of the car. Your thoughts on this and what exactly should be done? A simple fluid drain and refill, pan dropped and cleaned with a new filter, or complete flush? What should I be paying for this service?

A. Always an interesting question when the manufacturer says lifetime fluid. As an example, BMW lists the transmission fluid as a lifetime fill, but the transmission manufacturers state the fluid should be changed every 60,000 miles. I think it is a good idea to change the fluid (drain and refill) depending on how you d

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